Insulator.



A. J. ENGELHARDT.

v msumon.

APPLICATION FILED JULY 12. I915- 1 172,963. I Patented Feb. 22, 1916.

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AUGUST 3'. ENGELHARDT, OF NEW ORLEANS, LOUISIANA.

INSULATOR.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed July 12, 1915. Serial No. 39,417.

To all whom it may concern.

Be it known that 1, AUGUST J. Eivonn- IIARDT, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Insulators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improve ments in insulators, and has for an object to provide an improved insulator for supporting electric line conductors without the use of tie wires, as now generally employed.

Another object of the present invention resides in providing an improved insulator for supporting electric line conductors which will engage the conductor to form a bight therein and prevent slippage of the conductor longitudinally.

It is a further object of the present invention to provide an improved insulator for supporting electric line wires constructed with a recess having inclined base walls for receiving and forming a bight in the wire to bind the same against accidental slippage, and clamp members yieldingly engaging the line wire to either side of the recess and operating to maintain the same in close frictional contact with said inclined walls.

With these and other objects in view the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

In the accompanying drawings forming a part of this application, and in which similar reference symbols indicate corresponding parts in the several views: Figure 1 is an elevational view, partly in section, of an insulator constructed in accordance with the present invention. Fig. 2 is a side elevational view taken at right angles to Fig. 1. Fig. 3 is a top plan view of the improved insulator; and Fig. 4 is a perspective view:

of the improved clamp.

Referring more particularly to the drawings, wherein one embodiment of the present invention is illustrated, 1 designates the body portion of the improved insulator, the same being formed with a recessed and threaded base 2 for engaging the standard pins on the cross bars of telegraph poles or the like supports.

The body portion 1 is produced with the usual annular groove 3, and above said groove 3 the body portion is constructed conical, merging toward its apex into a pair of upstanding horns or lugs 1 and 5. As disclosed to advantage in Fig. 1 the horns 4 and 5 are spaced apart to provide a recess 6 therebetween for receiving the electric line wire or cable 7. The base of the recesses 6 is preferably constituted of transversely inclined walls 8 and 9, forming a depressed central trough for receiving the wire 7, and longitudinallyinclined walls 10 and 11, as indicated in Fig. 2, converging upwardly and centrally, andoperating to form a bight in the conductor 7 for prevent ing slippage, as hereinafter more fully described.

In the base of the horn 4 is provided an aperture 12 for accommodating a pivot constituted of the free ends 13 and 14 of the improved clamp, which is constructed of a single length of wire, and has its terminals 15 and 16 overturned to prevent displacement. The improved clamp further includes arms 17 and 18 extending diagonally upward from the respective ends 13 and 1.4, the same being ofl'set, as indicated at 19 and 20, and looped at 21 and 22 for imparting resiliency. From the loops 21 and 22 the wire is carried diagonally downward to provide arms 23 and 24, forming with the arms 17 and 18 a pair of V-shaped members pivotally mounted in the aperture 12 and embracing opposite sides of the horns 4: and 5. The lower end of the arms 23 and 24 are connected by a cross rod 25 looped at its ends 26 and 27, as shown'in Figs. 2 and 3, for imparting a further resiliency, facilitating the engagement and removal of the cross bar 25 with one of a series of notches or teeth 28 provided on the exterior face of the horn 5.

A tool, such as shown in Figs. 1 and 2, may, if desired, be used to assist in disengaging the clamp from the position therein shown; such tool advantageously consisting of a single length of wire bent to provide arms 29 and 30, connected at their lower ends by a bar 31 and formed at their upper free ends into hooks 32 and 33 for detachable connection to the loops 26 and'27 on the cross bar 25.

It will be understood that the cable or wire 7 is first positioned within the recess 6, and the clamp device thereupon revolved about the pivot provided by the ends 13 and 14: mounted in the aperture 12, to the position shown in the drawings Where the cross bar 25 is engaged with one of the notches 28. In such position the V-shaped arrangement of the complemental arms 17 and23 and 18 and 2% cooperate and form a counterpart of the inclined walls 8 and 9, thereby binding the wire 7 on either side of the recess 6 closely into the trough therein. The wire 7, with the bight formed by the longitudinally -inclined Walls 10 and 11, and being engaged by the arms of the clamp device will be securely held against slippage or accidental displacement, and through the loops 21 and 22 such engagement will be resilient to prevent the cutting of the insulation of the conductor. In removing the line wire 7, a tool, such as shown in the drawings, may be engaged through the loops 26 and 27, and the bar 25 disengaged from the notch 28, and the whole clamp device swung about the pivot 12 to the Opposite side of the insulator.

It is obvious that those skilled in the art may vary the details of construction and arrangements of parts without departing from the spirit of my invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

I claim:

1. An improved insulator of the character described comprising a body portion, a pair of horns projecting from said body portion 7 and providing a recess therebetween for receiving the line wire, a series of notches formed in one of said horns, a clamp pivoted in the other of said horns and including a pair of resilient V-shaped members for engaging the line wire at opposite sides of the recess, and a cross bar connecting said V- shaped members and adapted to cooperate with said series of notches to secure the clamp in engaging position, substantially as described. I

2. An improved insulator of the character described comprising a body portion, a pair of horns extending from said body portion and spaced to provide a recess therebetween for receiving the line wire, longitudinally and laterally inclined walls constituting the base of said recess and operating to form a bight in the line wire, a clamp constructed of a single length of wire arranged to provide a pivot mounted in one of said horns, a pair of resilient V-shaped members looped centrally and arranged to engage the line wire at opposite sides of the recess, a cross bar connecting opposite ends of said V-shaped members, and a series of notches on the other of said horns for receiving said cross bar to hold the clamp in operative position, substantially as described.

In testimony whereof, I affix my signature.

AUGUST J. ENGELHARDT. 

